Hirate 3" Caster with 3/8"-16UNC Threaded Stem Bolt(2 Casters with Brake Lock, 3 Without), Heavy Duty Swivel Stem Casters Safe for Hardwood Tile Carpet Floor

• IMPERIAL STEM SIZE: Our caster are standard 3/8" with 16 TPI,Coarse Thread (US), the stud diameter is 3/8"-16UNC and the stud length is 0.79"(20mm), if your chair socket is METRIC M10 , this caster is incompatible.
• LOCKABLE CASTER : There are 2 Pack Caster constructed with brake pedal, it can brake the rotation of the caster only, but the stem is still moveable for direction.
• HEAVY DUTY CASTERS: Our chair casters are made from industrial-grade steel, precision ball bearings, and durable polyurethane chair casters, can support up to 650lb for 5 pack 3 INCH casters, can be widely used for most chairs and other furniture with IMPERIAL STEM 3/8" only.
• SATISFACTION GUARANTEE:The package comes with set of 5 caster Casters(2 with brake, other 3 without) . Each caster will be backed by Hirate with lifetime warranty of replacement free.
• QUIET & SMOOTH ROLLER: Made of high-tech elastic polyurethane, with double bearings are quick rolling and the surface is sleek,wouldn't get stuck by crumbs,hair, wouldn't damage on floors.

A good caster will help you prevent costly floor repairs and forget the desk chair mats. And lockable casters let you prevent unwanted movements when you’re sitting, which is especially common (and annoying) on hard surfaces. Hirate Chair Casters with Brakes will meet your need. High quality polyurethane material will not to scratch or leave marks on any surface, protect your floor perfectly. There are 3 Standard Casters and 2 Casters with Locking Mechanism, you can fix your chair as you like! Features: 【2 PCS LOCKABLE CASTER 】 --SINGLE LOCKABLE: the brake locks the CasterS ONLY and the swivel is still moveable. -- With brake, effective to stop and fix the device and prevent it moving to hurt others. 【HIGH QUALITY MATERIAL】 -Made of high quality polyurethane, which is high mechanical strength, shock absorption and low-noise. 【SMOOTH & QUIET ROLLING】 -Two precise bearings and soft polyurethane ensure that you can slide and glide around in total silence with these swivel casters. Specification: *Stem Type: IMPERIAL SIZE *Stem Diameter: 3/8" *Stud Length: 0.79"(20mm) *Caster Type: Threaded Caster *Caster Diameter: 3"(75mm) *Caster Width:0.87" *Installing Height: 3.8" *Installing nut size: 3/8"-16x0.79" *Caster Material: Polyurethane *Bracket: High quality steel - galvanizing *Double Bearing: Steel ball bearing *Total Load Capacity: 650 lbs/5pcs Package Contains: 2 x 3" Stem Casters with BRAKE 3 x 3" Standard Casters without brake WARNTING TIPS: THIS IS IMPERIAL STEM 3/8", NOT METRIC, PLEASE KINDLY CHECK YOURS BEFORE PURCHASE. Hirate Smooth Office Chair Casters-No Matter What Surface You Choose, It’s Like Roller Skating At Your Desk.